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16. If you were asked to make a heterogeneous mixture, which of the following will you choose? A Coffee and milk 1. Salt and water C Gravel and sand D. Vinegar and water 17 A homogeneous mixture has only one phase with uniform composition throughout. Which of the following mixtures has these properties? A Instant cofree stirred in het water B Chalk dust in water C Oil and water D Sands and pebbles 18. What will make you conclude that air is a mixture and not a compound? A. Air han varying composition of gases B. Air appears homogeneous C. Air supports combustion D. Air has mass 19. Water decomposes into oxygen and hydrogen gas through the process known as electrolysis From this observation, what is the best conclusion that you can make? A. Neither of the products can be an element B. One of the products can be an element C. Water is not an element D. Both products are elements 20. When the sand is mixed with the water, it settle at the bottom of a container. Is this sample a mixture or a substance? A Pure substance because it has a definite composition B. Mixture because it has fixed definite composition C Pure substance since it is the same throughout D. Mixture because it has variable composition Prepared by: Cho
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